How do I make Google calendar the default calendar in Outlook?

I love the sync feature, but want the Google Calendar to be the default calendar in Outlook. In other words, if I add an event to my calendar in outlook, I want it to be adding to the Google calendar.

My problem is that when I delete something from the Outlook calendar from my mobile device (Palm Pre) it syncs up with Outlook (default calendar) and then as a result deletes the item from my Google calendar as well.